#vpkpx isn't implemented yet
#test_vpkpx_1:
#  #_ REGISTER_IN v3 [00101820, 01283038, 00404850, 01586068]
#  #_ REGISTER_IN v4 [01707880, 00889098, 01A0A8B0, 00B8C0C8]
#  vpkpx v5, v3, v4
#  blr
#  #_ REGISTER_OUT v3 [00101820, 01283038, 00404850, 01586068]
#  #_ REGISTER_OUT v4 [01707880, 00889098, 01A0A8B0, 00B8C0C8]
#  #_ REGISTER_OUT v5 [086494C7, 212AAD8D, B9F04653, D2B65F19]
